Collaboration across sectors is necessary to solve problems whose root causes are complex and multifaceted, and which need extensive, coordinated resources from many different sources," says Carolyn Riehl, associate professor of education at Columbia University's Teachers College and co-author of the March report "Collective Impact and the New Generation of Cross-Sector Collaborations for Education.

Between 11,700 and 9,800 years ago, residents of Chogha Golan, a settlement in the foothills of Iran's Zagros Mountains, went from cultivating wild ancestors of modern crops to growing a form of domesticated wheat called emmer, say archaeobotanist Simone Riehl of the University of Tubingen, Germany, and her colleagues.

About five years ago, archaeologist Nicholas Conard and archaeobotanist Simone Riehl of the University of Tubingen in Germany hooked up with researchers at the Iranian Center for Archaeological Research (ICAR) in Tehran, and particularly Mohsen Zeidi, an experienced ICAR excavator, to begin work at the early farming village of Chogha Golan, in the foothills of the Zagros Mountains.

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